Joshua Nelson sings Adon Olam at Limmud 2006
And speaking of diversity of Jewish music, here are a few clips from Israeli television. Aviv and Idan in a Greek-Hebrew duet, on the "Scent of menta" show on music channel 24. The songs are classic Greek 50's and 60's "laika".
Another Israeli favourite of mine, the versatile combo "Ma Kashur?", who are popular comedians as well: